| Most common failures | No# failures |
|---|
| Parking brake: efficiency below requirements |3.7.B.7| | 652 |
| Registration plate lamp issues | 558 |
| Headlamp aim out of alignment | 468 |
| Windscreen wiper does not clear the windscreen effectively | 383 |
| Rear parking brake recording little or no effort | 366 |
| Brake pipe excessively corroded | 286 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 161 |
| Exhaust emits an excessive level of metered smoke for a turbo charged engine |7.4.B.3b| | 143 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 139 |
| Registration plate issues | 105 |
| Parking brake lever has no reserve travel |3.1.6b| | 104 |
| Brakes imbalanced across an axle | 94 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 70 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 69 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 69 |
| Anti-lock braking system warning lamp indicates an ABS fault | 67 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 57 |
| Rear brake binding | 53 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 48 |
| Nearside Front Shock absorber has a serious fluid leak |2.7.3| | 42 |
| Front brake disc in such a condition that it is seriously weakened | 40 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 35 |
| Nearside Front Track rod end ball joint has excessive play |2.2.B.1f| | 32 |
| Offside Front Track rod end ball joint has excessive play |2.2.B.1f| | 32 |
| Parking brake efficiency below requirements |1.4.2 |a| |i|| | 31 |
| Rear brake disc in such a condition that it is seriously weakened | 30 |
| Nearside Headlamp aim aimed so that it dazzles other road users |1.8.A.1a| | 29 |
| Offside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 29 |
| Nearside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 28 |
| Rear brake application uneven | 27 |
| Fuel system component leaking |7.2.3| | 27 |
| Nearside Track rod end ball joint has excessive play |2.2.B.1f| | 26 |
| Service brake: efficiency below requirements |3.7.B.7| | 25 |
| Windscreen has damage | 24 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 24 |
| Offside Headlamp aim aimed so that it dazzles other road users |1.8.A.1a| | 23 |
| Offside Track rod end ball joint has excessive play |2.2.B.1f| | 23 |
| Offside Front Shock absorber has a serious fluid leak |2.7.3| | 22 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 21 |
| Front brake excessively fluctuating | 21 |
| Offside Headlamp not in good working order adversely affecting beam image |1.2.4a| | 20 |
| Supplementary Restraint System warning lamp indicates a fault |5.4.2| | 18 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 18 |
| Brake pedal creeps down when held under pressure |3.3.B.1a| | 17 |
| Exhaust emits excessive smoke or vapour of any colour |7.4.B.4| | 17 |
| Brake pedal spongy |3.3.B.1b| | 15 |
| Front brake application uneven | 15 |
| Nearside Stop lamp not working |1.2.1b| | 15 |
| Battery insecure |1.9.1| | 15 |
| Offside Rear Brake cable has wires broken and is significantly weakened |3.5.1b| | 14 |
| Parking brake efficiency less than 50% of the required value |1.4.2 |a| |ii|| | 14 |
| Offside Stop lamp not working |1.2.1b| | 14 |
| Front position lamp|s| not working |1.1.A.3b| | 14 |
| Nearside Front Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2| | 14 |
| Offside Rear Stop lamp not working |1.2.1b| | 13 |
| Offside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 13 |
| Offside Front Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2| | 13 |
| Nearside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 12 |
| Rear Mechanical brake component has restricted free movement | 12 |
| Nearside Rear Stop lamp not working |1.2.1b| | 11 |
| Windscreen washer not working | 11 |
| Offside Brake cable has wires broken and is significantly weakened |3.5.1b| | 11 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 11 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 11 |
| Offside rear brake recording little or no effort |3.7.B.5a| | 10 |
| Offside Rear Shock absorber has a serious fluid leak |2.7.3| | 10 |
| Offside Front position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 10 |
| Nearside Front position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 10 |
| Nearside Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a| | 10 |
| Offside Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a| | 10 |
| Emissions not tested |7.0| | 9 |
| Nearside Headlamp not in good working order adversely affecting beam image |1.2.4a| | 9 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 9 |
| Nearside Front position lamp|s| not in good working order |function impaired| |1.1.4a| | 9 |
| Rear Brake cable insecure | 9 |
| Offside Rear brake disc excessively pitted |3.5.1h| | 9 |
| Offside Rear brake caliper has restricted free movement |3.5.1k| | 9 |
| Offside Front Anti-roll bar attachment bracket/mounting fractured |2.4.G.1| | 8 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 8 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 8 |
| Rear fog lamp not working |1.3.2b| | 8 |
| Offside Front Suspension arm has excessive play in a ball joint |2.4.G.2| | 8 |
| Nearside Rear Shock absorber has a serious fluid leak |2.7.3| | 8 |
| Offside rear brake juddering severely |3.7.A.5b| | 8 |
| Offside Rear Anti-roll bar rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 8 |
| Windscreen wiper blade insecure | 8 |
| Brake pedal creeps down while the pedal is held under pressure |3.3.B.1a| | 8 |